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<pre><span class="sourceLineNo">001</span>/* ===========================================================<a name="line.1"></a>
<span class="sourceLineNo">002</span> * JFreeChart : a free chart library for the Java(tm) platform<a name="line.2"></a>
<span class="sourceLineNo">003</span> * ===========================================================<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * (C) Copyright 2000-2011, by Object Refinery Limited and Contributors.<a name="line.5"></a>
<span class="sourceLineNo">006</span> *<a name="line.6"></a>
<span class="sourceLineNo">007</span> * Project Info:  http://www.jfree.org/jfreechart/index.html<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> * This library is free software; you can redistribute it and/or modify it <a name="line.9"></a>
<span class="sourceLineNo">010</span> * under the terms of the GNU Lesser General Public License as published by <a name="line.10"></a>
<span class="sourceLineNo">011</span> * the Free Software Foundation; either version 2.1 of the License, or <a name="line.11"></a>
<span class="sourceLineNo">012</span> * (at your option) any later version.<a name="line.12"></a>
<span class="sourceLineNo">013</span> *<a name="line.13"></a>
<span class="sourceLineNo">014</span> * This library is distributed in the hope that it will be useful, but <a name="line.14"></a>
<span class="sourceLineNo">015</span> * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY <a name="line.15"></a>
<span class="sourceLineNo">016</span> * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public <a name="line.16"></a>
<span class="sourceLineNo">017</span> * License for more details.<a name="line.17"></a>
<span class="sourceLineNo">018</span> *<a name="line.18"></a>
<span class="sourceLineNo">019</span> * You should have received a copy of the GNU Lesser General Public<a name="line.19"></a>
<span class="sourceLineNo">020</span> * License along with this library; if not, write to the Free Software<a name="line.20"></a>
<span class="sourceLineNo">021</span> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, <a name="line.21"></a>
<span class="sourceLineNo">022</span> * USA.  <a name="line.22"></a>
<span class="sourceLineNo">023</span> *<a name="line.23"></a>
<span class="sourceLineNo">024</span> * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. <a name="line.24"></a>
<span class="sourceLineNo">025</span> * Other names may be trademarks of their respective owners.]<a name="line.25"></a>
<span class="sourceLineNo">026</span> *<a name="line.26"></a>
<span class="sourceLineNo">027</span> * ------------------<a name="line.27"></a>
<span class="sourceLineNo">028</span> * HashUtilities.java<a name="line.28"></a>
<span class="sourceLineNo">029</span> * ------------------<a name="line.29"></a>
<span class="sourceLineNo">030</span> * (C) Copyright 2006, 2007, by Object Refinery Limited;<a name="line.30"></a>
<span class="sourceLineNo">031</span> *<a name="line.31"></a>
<span class="sourceLineNo">032</span> * Original Author:  David Gilbert (for Object Refinery Limited);<a name="line.32"></a>
<span class="sourceLineNo">033</span> * Contributor(s):   -;<a name="line.33"></a>
<span class="sourceLineNo">034</span> *<a name="line.34"></a>
<span class="sourceLineNo">035</span> * Changes<a name="line.35"></a>
<span class="sourceLineNo">036</span> * -------<a name="line.36"></a>
<span class="sourceLineNo">037</span> * 03-Oct-2006 : Version 1 (DG);<a name="line.37"></a>
<span class="sourceLineNo">038</span> * 06-Mar-2007 : Fix for hashCodeForDoubleArray() method (DG);<a name="line.38"></a>
<span class="sourceLineNo">039</span> * 13-Nov-2007 : Added new utility methods (DG);<a name="line.39"></a>
<span class="sourceLineNo">040</span> * 22-Nov-2007 : Added hashCode() method for 'int' (DG);<a name="line.40"></a>
<span class="sourceLineNo">041</span> * 05-Dec-2007 : Added special methods to handle BooleanList, PaintList,<a name="line.41"></a>
<span class="sourceLineNo">042</span> *               and StrokeList (DG);<a name="line.42"></a>
<span class="sourceLineNo">043</span> *<a name="line.43"></a>
<span class="sourceLineNo">044</span> */<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>package org.jfree.chart;<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>import java.awt.GradientPaint;<a name="line.48"></a>
<span class="sourceLineNo">049</span>import java.awt.Paint;<a name="line.49"></a>
<span class="sourceLineNo">050</span>import java.awt.Stroke;<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span>import org.jfree.util.BooleanList;<a name="line.52"></a>
<span class="sourceLineNo">053</span>import org.jfree.util.PaintList;<a name="line.53"></a>
<span class="sourceLineNo">054</span>import org.jfree.util.StrokeList;<a name="line.54"></a>
<span class="sourceLineNo">055</span><a name="line.55"></a>
<span class="sourceLineNo">056</span>/**<a name="line.56"></a>
<span class="sourceLineNo">057</span> * Some utility methods for calculating hash codes.  <a name="line.57"></a>
<span class="sourceLineNo">058</span> * <a name="line.58"></a>
<span class="sourceLineNo">059</span> * @since 1.0.3<a name="line.59"></a>
<span class="sourceLineNo">060</span> */<a name="line.60"></a>
<span class="sourceLineNo">061</span>public class HashUtilities {<a name="line.61"></a>
<span class="sourceLineNo">062</span>    <a name="line.62"></a>
<span class="sourceLineNo">063</span>    /**<a name="line.63"></a>
<span class="sourceLineNo">064</span>     * Returns a hash code for a &lt;code&gt;Paint&lt;/code&gt; instance.  If <a name="line.64"></a>
<span class="sourceLineNo">065</span>     * &lt;code&gt;p&lt;/code&gt; is &lt;code&gt;null&lt;/code&gt;, this method returns zero.<a name="line.65"></a>
<span class="sourceLineNo">066</span>     * <a name="line.66"></a>
<span class="sourceLineNo">067</span>     * @param p  the paint (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.67"></a>
<span class="sourceLineNo">068</span>     * <a name="line.68"></a>
<span class="sourceLineNo">069</span>     * @return The hash code.<a name="line.69"></a>
<span class="sourceLineNo">070</span>     */<a name="line.70"></a>
<span class="sourceLineNo">071</span>    public static int hashCodeForPaint(Paint p) {<a name="line.71"></a>
<span class="sourceLineNo">072</span>        if (p == null) {<a name="line.72"></a>
<span class="sourceLineNo">073</span>            return 0;<a name="line.73"></a>
<span class="sourceLineNo">074</span>        }<a name="line.74"></a>
<span class="sourceLineNo">075</span>        int result = 0;<a name="line.75"></a>
<span class="sourceLineNo">076</span>        // handle GradientPaint as a special case<a name="line.76"></a>
<span class="sourceLineNo">077</span>        if (p instanceof GradientPaint) {<a name="line.77"></a>
<span class="sourceLineNo">078</span>            GradientPaint gp = (GradientPaint) p;<a name="line.78"></a>
<span class="sourceLineNo">079</span>            result = 193;<a name="line.79"></a>
<span class="sourceLineNo">080</span>            result = 37 * result + gp.getColor1().hashCode();<a name="line.80"></a>
<span class="sourceLineNo">081</span>            result = 37 * result + gp.getPoint1().hashCode();<a name="line.81"></a>
<span class="sourceLineNo">082</span>            result = 37 * result + gp.getColor2().hashCode();<a name="line.82"></a>
<span class="sourceLineNo">083</span>            result = 37 * result + gp.getPoint2().hashCode();<a name="line.83"></a>
<span class="sourceLineNo">084</span>        }<a name="line.84"></a>
<span class="sourceLineNo">085</span>        else {<a name="line.85"></a>
<span class="sourceLineNo">086</span>            // we assume that all other Paint instances implement equals() and<a name="line.86"></a>
<span class="sourceLineNo">087</span>            // hashCode()...of course that might not be true, but what can we<a name="line.87"></a>
<span class="sourceLineNo">088</span>            // do about it?<a name="line.88"></a>
<span class="sourceLineNo">089</span>            result = p.hashCode();<a name="line.89"></a>
<span class="sourceLineNo">090</span>        }<a name="line.90"></a>
<span class="sourceLineNo">091</span>        return result;<a name="line.91"></a>
<span class="sourceLineNo">092</span>    }<a name="line.92"></a>
<span class="sourceLineNo">093</span>    <a name="line.93"></a>
<span class="sourceLineNo">094</span>    /**<a name="line.94"></a>
<span class="sourceLineNo">095</span>     * Returns a hash code for a &lt;code&gt;double[]&lt;/code&gt; instance.  If the array<a name="line.95"></a>
<span class="sourceLineNo">096</span>     * is &lt;code&gt;null&lt;/code&gt;, this method returns zero.<a name="line.96"></a>
<span class="sourceLineNo">097</span>     * <a name="line.97"></a>
<span class="sourceLineNo">098</span>     * @param a  the array (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.98"></a>
<span class="sourceLineNo">099</span>     * <a name="line.99"></a>
<span class="sourceLineNo">100</span>     * @return The hash code.<a name="line.100"></a>
<span class="sourceLineNo">101</span>     */<a name="line.101"></a>
<span class="sourceLineNo">102</span>    public static int hashCodeForDoubleArray(double[] a) {<a name="line.102"></a>
<span class="sourceLineNo">103</span>        if (a == null) { <a name="line.103"></a>
<span class="sourceLineNo">104</span>            return 0;<a name="line.104"></a>
<span class="sourceLineNo">105</span>        }<a name="line.105"></a>
<span class="sourceLineNo">106</span>        int result = 193;<a name="line.106"></a>
<span class="sourceLineNo">107</span>        long temp;<a name="line.107"></a>
<span class="sourceLineNo">108</span>        for (int i = 0; i &lt; a.length; i++) {<a name="line.108"></a>
<span class="sourceLineNo">109</span>            temp = Double.doubleToLongBits(a[i]);<a name="line.109"></a>
<span class="sourceLineNo">110</span>            result = 29 * result + (int) (temp ^ (temp &gt;&gt;&gt; 32));<a name="line.110"></a>
<span class="sourceLineNo">111</span>        }<a name="line.111"></a>
<span class="sourceLineNo">112</span>        return result;<a name="line.112"></a>
<span class="sourceLineNo">113</span>    }<a name="line.113"></a>
<span class="sourceLineNo">114</span>    <a name="line.114"></a>
<span class="sourceLineNo">115</span>    /**<a name="line.115"></a>
<span class="sourceLineNo">116</span>     * Returns a hash value based on a seed value and the value of a boolean<a name="line.116"></a>
<span class="sourceLineNo">117</span>     * primitive.<a name="line.117"></a>
<span class="sourceLineNo">118</span>     * <a name="line.118"></a>
<span class="sourceLineNo">119</span>     * @param pre  the seed value.<a name="line.119"></a>
<span class="sourceLineNo">120</span>     * @param b  the boolean value.<a name="line.120"></a>
<span class="sourceLineNo">121</span>     * <a name="line.121"></a>
<span class="sourceLineNo">122</span>     * @return A hash value.<a name="line.122"></a>
<span class="sourceLineNo">123</span>     * <a name="line.123"></a>
<span class="sourceLineNo">124</span>     * @since 1.0.7<a name="line.124"></a>
<span class="sourceLineNo">125</span>     */<a name="line.125"></a>
<span class="sourceLineNo">126</span>    public static int hashCode(int pre, boolean b) {<a name="line.126"></a>
<span class="sourceLineNo">127</span>        return 37 * pre + (b ? 0 : 1);<a name="line.127"></a>
<span class="sourceLineNo">128</span>    }<a name="line.128"></a>
<span class="sourceLineNo">129</span>    <a name="line.129"></a>
<span class="sourceLineNo">130</span>    /**<a name="line.130"></a>
<span class="sourceLineNo">131</span>     * Returns a hash value based on a seed value and the value of an int<a name="line.131"></a>
<span class="sourceLineNo">132</span>     * primitive.<a name="line.132"></a>
<span class="sourceLineNo">133</span>     * <a name="line.133"></a>
<span class="sourceLineNo">134</span>     * @param pre  the seed value.<a name="line.134"></a>
<span class="sourceLineNo">135</span>     * @param i  the int value.<a name="line.135"></a>
<span class="sourceLineNo">136</span>     * <a name="line.136"></a>
<span class="sourceLineNo">137</span>     * @return A hash value.<a name="line.137"></a>
<span class="sourceLineNo">138</span>     * <a name="line.138"></a>
<span class="sourceLineNo">139</span>     * @since 1.0.8<a name="line.139"></a>
<span class="sourceLineNo">140</span>     */<a name="line.140"></a>
<span class="sourceLineNo">141</span>    public static int hashCode(int pre, int i) {<a name="line.141"></a>
<span class="sourceLineNo">142</span>        return 37 * pre + i;<a name="line.142"></a>
<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
<span class="sourceLineNo">145</span>    /**<a name="line.145"></a>
<span class="sourceLineNo">146</span>     * Returns a hash value based on a seed value and the value of a double<a name="line.146"></a>
<span class="sourceLineNo">147</span>     * primitive.<a name="line.147"></a>
<span class="sourceLineNo">148</span>     * <a name="line.148"></a>
<span class="sourceLineNo">149</span>     * @param pre  the seed value.<a name="line.149"></a>
<span class="sourceLineNo">150</span>     * @param d  the double value.<a name="line.150"></a>
<span class="sourceLineNo">151</span>     * <a name="line.151"></a>
<span class="sourceLineNo">152</span>     * @return A hash value.<a name="line.152"></a>
<span class="sourceLineNo">153</span>     * <a name="line.153"></a>
<span class="sourceLineNo">154</span>     * @since 1.0.7<a name="line.154"></a>
<span class="sourceLineNo">155</span>     */<a name="line.155"></a>
<span class="sourceLineNo">156</span>    public static int hashCode(int pre, double d) {<a name="line.156"></a>
<span class="sourceLineNo">157</span>        long l = Double.doubleToLongBits(d);<a name="line.157"></a>
<span class="sourceLineNo">158</span>        return 37 * pre + (int) (l ^ (l &gt;&gt;&gt; 32));<a name="line.158"></a>
<span class="sourceLineNo">159</span>    }<a name="line.159"></a>
<span class="sourceLineNo">160</span>    <a name="line.160"></a>
<span class="sourceLineNo">161</span>    /**<a name="line.161"></a>
<span class="sourceLineNo">162</span>     * Returns a hash value based on a seed value and a paint instance.<a name="line.162"></a>
<span class="sourceLineNo">163</span>     * <a name="line.163"></a>
<span class="sourceLineNo">164</span>     * @param pre  the seed value.<a name="line.164"></a>
<span class="sourceLineNo">165</span>     * @param p  the paint (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.165"></a>
<span class="sourceLineNo">166</span>     * <a name="line.166"></a>
<span class="sourceLineNo">167</span>     * @return A hash value.<a name="line.167"></a>
<span class="sourceLineNo">168</span>     * <a name="line.168"></a>
<span class="sourceLineNo">169</span>     * @since 1.0.7<a name="line.169"></a>
<span class="sourceLineNo">170</span>     */<a name="line.170"></a>
<span class="sourceLineNo">171</span>    public static int hashCode(int pre, Paint p) {<a name="line.171"></a>
<span class="sourceLineNo">172</span>        return 37 * pre + hashCodeForPaint(p);<a name="line.172"></a>
<span class="sourceLineNo">173</span>    }<a name="line.173"></a>
<span class="sourceLineNo">174</span><a name="line.174"></a>
<span class="sourceLineNo">175</span>    /**<a name="line.175"></a>
<span class="sourceLineNo">176</span>     * Returns a hash value based on a seed value and a stroke instance.<a name="line.176"></a>
<span class="sourceLineNo">177</span>     * <a name="line.177"></a>
<span class="sourceLineNo">178</span>     * @param pre  the seed value.<a name="line.178"></a>
<span class="sourceLineNo">179</span>     * @param s  the stroke (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.179"></a>
<span class="sourceLineNo">180</span>     * <a name="line.180"></a>
<span class="sourceLineNo">181</span>     * @return A hash value.<a name="line.181"></a>
<span class="sourceLineNo">182</span>     * <a name="line.182"></a>
<span class="sourceLineNo">183</span>     * @since 1.0.7<a name="line.183"></a>
<span class="sourceLineNo">184</span>     */<a name="line.184"></a>
<span class="sourceLineNo">185</span>    public static int hashCode(int pre, Stroke s) {<a name="line.185"></a>
<span class="sourceLineNo">186</span>        int h = (s != null ? s.hashCode() : 0);<a name="line.186"></a>
<span class="sourceLineNo">187</span>        return 37 * pre + h;<a name="line.187"></a>
<span class="sourceLineNo">188</span>    }<a name="line.188"></a>
<span class="sourceLineNo">189</span><a name="line.189"></a>
<span class="sourceLineNo">190</span>    /**<a name="line.190"></a>
<span class="sourceLineNo">191</span>     * Returns a hash value based on a seed value and a string instance.<a name="line.191"></a>
<span class="sourceLineNo">192</span>     * <a name="line.192"></a>
<span class="sourceLineNo">193</span>     * @param pre  the seed value.<a name="line.193"></a>
<span class="sourceLineNo">194</span>     * @param s  the string (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.194"></a>
<span class="sourceLineNo">195</span>     * <a name="line.195"></a>
<span class="sourceLineNo">196</span>     * @return A hash value.<a name="line.196"></a>
<span class="sourceLineNo">197</span>     * <a name="line.197"></a>
<span class="sourceLineNo">198</span>     * @since 1.0.7<a name="line.198"></a>
<span class="sourceLineNo">199</span>     */<a name="line.199"></a>
<span class="sourceLineNo">200</span>    public static int hashCode(int pre, String s) {<a name="line.200"></a>
<span class="sourceLineNo">201</span>        int h = (s != null ? s.hashCode() : 0);<a name="line.201"></a>
<span class="sourceLineNo">202</span>        return 37 * pre + h;<a name="line.202"></a>
<span class="sourceLineNo">203</span>    }<a name="line.203"></a>
<span class="sourceLineNo">204</span><a name="line.204"></a>
<span class="sourceLineNo">205</span>    /**<a name="line.205"></a>
<span class="sourceLineNo">206</span>     * Returns a hash value based on a seed value and a &lt;code&gt;Comparable&lt;/code&gt;<a name="line.206"></a>
<span class="sourceLineNo">207</span>     * instance.<a name="line.207"></a>
<span class="sourceLineNo">208</span>     * <a name="line.208"></a>
<span class="sourceLineNo">209</span>     * @param pre  the seed value.<a name="line.209"></a>
<span class="sourceLineNo">210</span>     * @param c  the comparable (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.210"></a>
<span class="sourceLineNo">211</span>     * <a name="line.211"></a>
<span class="sourceLineNo">212</span>     * @return A hash value.<a name="line.212"></a>
<span class="sourceLineNo">213</span>     * <a name="line.213"></a>
<span class="sourceLineNo">214</span>     * @since 1.0.7<a name="line.214"></a>
<span class="sourceLineNo">215</span>     */<a name="line.215"></a>
<span class="sourceLineNo">216</span>    public static int hashCode(int pre, Comparable c) {<a name="line.216"></a>
<span class="sourceLineNo">217</span>        int h = (c != null ? c.hashCode() : 0);<a name="line.217"></a>
<span class="sourceLineNo">218</span>        return 37 * pre + h;<a name="line.218"></a>
<span class="sourceLineNo">219</span>    }<a name="line.219"></a>
<span class="sourceLineNo">220</span><a name="line.220"></a>
<span class="sourceLineNo">221</span>    /**<a name="line.221"></a>
<span class="sourceLineNo">222</span>     * Returns a hash value based on a seed value and an &lt;code&gt;Object&lt;/code&gt;<a name="line.222"></a>
<span class="sourceLineNo">223</span>     * instance.<a name="line.223"></a>
<span class="sourceLineNo">224</span>     * <a name="line.224"></a>
<span class="sourceLineNo">225</span>     * @param pre  the seed value.<a name="line.225"></a>
<span class="sourceLineNo">226</span>     * @param obj  the object (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.226"></a>
<span class="sourceLineNo">227</span>     * <a name="line.227"></a>
<span class="sourceLineNo">228</span>     * @return A hash value.<a name="line.228"></a>
<span class="sourceLineNo">229</span>     * <a name="line.229"></a>
<span class="sourceLineNo">230</span>     * @since 1.0.8<a name="line.230"></a>
<span class="sourceLineNo">231</span>     */<a name="line.231"></a>
<span class="sourceLineNo">232</span>    public static int hashCode(int pre, Object obj) {<a name="line.232"></a>
<span class="sourceLineNo">233</span>        int h = (obj != null ? obj.hashCode() : 0);<a name="line.233"></a>
<span class="sourceLineNo">234</span>        return 37 * pre + h;<a name="line.234"></a>
<span class="sourceLineNo">235</span>    }<a name="line.235"></a>
<span class="sourceLineNo">236</span>    <a name="line.236"></a>
<span class="sourceLineNo">237</span>    /**<a name="line.237"></a>
<span class="sourceLineNo">238</span>     * Computes a hash code for a {@link BooleanList}.  In the latest version<a name="line.238"></a>
<span class="sourceLineNo">239</span>     * of JCommon, the {@link BooleanList} class should implement the hashCode()<a name="line.239"></a>
<span class="sourceLineNo">240</span>     * method correctly, but we compute it here anyway so that we can work with <a name="line.240"></a>
<span class="sourceLineNo">241</span>     * older versions of JCommon (back to 1.0.0).<a name="line.241"></a>
<span class="sourceLineNo">242</span>     * <a name="line.242"></a>
<span class="sourceLineNo">243</span>     * @param pre  the seed value.<a name="line.243"></a>
<span class="sourceLineNo">244</span>     * @param list  the list (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.244"></a>
<span class="sourceLineNo">245</span>     * <a name="line.245"></a>
<span class="sourceLineNo">246</span>     * @return The hash code.<a name="line.246"></a>
<span class="sourceLineNo">247</span>     * <a name="line.247"></a>
<span class="sourceLineNo">248</span>     * @since 1.0.9<a name="line.248"></a>
<span class="sourceLineNo">249</span>     */<a name="line.249"></a>
<span class="sourceLineNo">250</span>    public static int hashCode(int pre, BooleanList list) {<a name="line.250"></a>
<span class="sourceLineNo">251</span>        if (list == null) {<a name="line.251"></a>
<span class="sourceLineNo">252</span>            return pre;<a name="line.252"></a>
<span class="sourceLineNo">253</span>        }<a name="line.253"></a>
<span class="sourceLineNo">254</span>        int result = 127;<a name="line.254"></a>
<span class="sourceLineNo">255</span>        int size = list.size();<a name="line.255"></a>
<span class="sourceLineNo">256</span>        result = HashUtilities.hashCode(result, size);<a name="line.256"></a>
<span class="sourceLineNo">257</span>        <a name="line.257"></a>
<span class="sourceLineNo">258</span>        // for efficiency, we just use the first, last and middle items to<a name="line.258"></a>
<span class="sourceLineNo">259</span>        // compute a hashCode...<a name="line.259"></a>
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<span class="sourceLineNo">262</span>            if (size &gt; 1) {<a name="line.262"></a>
<span class="sourceLineNo">263</span>                result = HashUtilities.hashCode(result, <a name="line.263"></a>
<span class="sourceLineNo">264</span>                        list.getBoolean(size - 1));<a name="line.264"></a>
<span class="sourceLineNo">265</span>                if (size &gt; 2) {<a name="line.265"></a>
<span class="sourceLineNo">266</span>                    result = HashUtilities.hashCode(result, <a name="line.266"></a>
<span class="sourceLineNo">267</span>                            list.getBoolean(size / 2));<a name="line.267"></a>
<span class="sourceLineNo">268</span>                }<a name="line.268"></a>
<span class="sourceLineNo">269</span>            }<a name="line.269"></a>
<span class="sourceLineNo">270</span>        }<a name="line.270"></a>
<span class="sourceLineNo">271</span>        return 37 * pre + result;<a name="line.271"></a>
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<span class="sourceLineNo">273</span><a name="line.273"></a>
<span class="sourceLineNo">274</span>    /**<a name="line.274"></a>
<span class="sourceLineNo">275</span>     * Computes a hash code for a {@link PaintList}.  In the latest version<a name="line.275"></a>
<span class="sourceLineNo">276</span>     * of JCommon, the {@link PaintList} class should implement the hashCode()<a name="line.276"></a>
<span class="sourceLineNo">277</span>     * method correctly, but we compute it here anyway so that we can work with <a name="line.277"></a>
<span class="sourceLineNo">278</span>     * older versions of JCommon (back to 1.0.0).<a name="line.278"></a>
<span class="sourceLineNo">279</span>     * <a name="line.279"></a>
<span class="sourceLineNo">280</span>     * @param pre  the seed value.<a name="line.280"></a>
<span class="sourceLineNo">281</span>     * @param list  the list (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.281"></a>
<span class="sourceLineNo">282</span>     * <a name="line.282"></a>
<span class="sourceLineNo">283</span>     * @return The hash code.<a name="line.283"></a>
<span class="sourceLineNo">284</span>     * <a name="line.284"></a>
<span class="sourceLineNo">285</span>     * @since 1.0.9<a name="line.285"></a>
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<span class="sourceLineNo">289</span>            return pre;<a name="line.289"></a>
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<span class="sourceLineNo">292</span>        int size = list.size();<a name="line.292"></a>
<span class="sourceLineNo">293</span>        result = HashUtilities.hashCode(result, size);<a name="line.293"></a>
<span class="sourceLineNo">294</span>        <a name="line.294"></a>
<span class="sourceLineNo">295</span>        // for efficiency, we just use the first, last and middle items to<a name="line.295"></a>
<span class="sourceLineNo">296</span>        // compute a hashCode...<a name="line.296"></a>
<span class="sourceLineNo">297</span>        if (size &gt; 0) {<a name="line.297"></a>
<span class="sourceLineNo">298</span>            result = HashUtilities.hashCode(result, list.getPaint(0));<a name="line.298"></a>
<span class="sourceLineNo">299</span>            if (size &gt; 1) {<a name="line.299"></a>
<span class="sourceLineNo">300</span>                result = HashUtilities.hashCode(result, <a name="line.300"></a>
<span class="sourceLineNo">301</span>                        list.getPaint(size - 1));<a name="line.301"></a>
<span class="sourceLineNo">302</span>                if (size &gt; 2) {<a name="line.302"></a>
<span class="sourceLineNo">303</span>                    result = HashUtilities.hashCode(result, <a name="line.303"></a>
<span class="sourceLineNo">304</span>                            list.getPaint(size / 2));<a name="line.304"></a>
<span class="sourceLineNo">305</span>                }<a name="line.305"></a>
<span class="sourceLineNo">306</span>            }<a name="line.306"></a>
<span class="sourceLineNo">307</span>        }<a name="line.307"></a>
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<span class="sourceLineNo">310</span><a name="line.310"></a>
<span class="sourceLineNo">311</span>    /**<a name="line.311"></a>
<span class="sourceLineNo">312</span>     * Computes a hash code for a {@link StrokeList}.  In the latest version<a name="line.312"></a>
<span class="sourceLineNo">313</span>     * of JCommon, the {@link StrokeList} class should implement the hashCode()<a name="line.313"></a>
<span class="sourceLineNo">314</span>     * method correctly, but we compute it here anyway so that we can work with <a name="line.314"></a>
<span class="sourceLineNo">315</span>     * older versions of JCommon (back to 1.0.0).<a name="line.315"></a>
<span class="sourceLineNo">316</span>     * <a name="line.316"></a>
<span class="sourceLineNo">317</span>     * @param pre  the seed value.<a name="line.317"></a>
<span class="sourceLineNo">318</span>     * @param list  the list (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.318"></a>
<span class="sourceLineNo">319</span>     * <a name="line.319"></a>
<span class="sourceLineNo">320</span>     * @return The hash code.<a name="line.320"></a>
<span class="sourceLineNo">321</span>     * <a name="line.321"></a>
<span class="sourceLineNo">322</span>     * @since 1.0.9<a name="line.322"></a>
<span class="sourceLineNo">323</span>     */<a name="line.323"></a>
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<span class="sourceLineNo">328</span>        int result = 127;<a name="line.328"></a>
<span class="sourceLineNo">329</span>        int size = list.size();<a name="line.329"></a>
<span class="sourceLineNo">330</span>        result = HashUtilities.hashCode(result, size);<a name="line.330"></a>
<span class="sourceLineNo">331</span>        <a name="line.331"></a>
<span class="sourceLineNo">332</span>        // for efficiency, we just use the first, last and middle items to<a name="line.332"></a>
<span class="sourceLineNo">333</span>        // compute a hashCode...<a name="line.333"></a>
<span class="sourceLineNo">334</span>        if (size &gt; 0) {<a name="line.334"></a>
<span class="sourceLineNo">335</span>            result = HashUtilities.hashCode(result, list.getStroke(0));<a name="line.335"></a>
<span class="sourceLineNo">336</span>            if (size &gt; 1) {<a name="line.336"></a>
<span class="sourceLineNo">337</span>                result = HashUtilities.hashCode(result, <a name="line.337"></a>
<span class="sourceLineNo">338</span>                        list.getStroke(size - 1));<a name="line.338"></a>
<span class="sourceLineNo">339</span>                if (size &gt; 2) {<a name="line.339"></a>
<span class="sourceLineNo">340</span>                    result = HashUtilities.hashCode(result, <a name="line.340"></a>
<span class="sourceLineNo">341</span>                            list.getStroke(size / 2));<a name="line.341"></a>
<span class="sourceLineNo">342</span>                }<a name="line.342"></a>
<span class="sourceLineNo">343</span>            }<a name="line.343"></a>
<span class="sourceLineNo">344</span>        }<a name="line.344"></a>
<span class="sourceLineNo">345</span>        return 37 * pre + result;<a name="line.345"></a>
<span class="sourceLineNo">346</span>    }<a name="line.346"></a>
<span class="sourceLineNo">347</span>}<a name="line.347"></a>




























































</pre>
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